Hm i see, Ok lets say oral is like my worst part of chinese lol. Other stuff like listening, translating and writing is ok for me.
What topic/s would you recommend, i dont really want spend that much time on it, cause i still gotta study alot for other subs.
Think about Chinese traditions, festivals, places, people, culture, institutes, its development, educational system, and history.You can even pick a great/famous Chinese person(this is hard)
Choosing a place,however, could be an easy/nice one. Pick a place in China (except for Tibet) that is preferably NOT well known, and of which could be fascinating at the same time(find something INTERESTING). Generally examiners are at about my parents' age & even younger, i know that they are quite happy to learn more about their own country, talk about the nice foods, products, local language and how it looks like etc. They are not likely to ask anything off-topic, there's limited things in which they could you ask about a place. To help you prepare for this topic, GOOGLE all the way
spend about 5-10 minutes per day googling about the place you will be searching for, prepare everything in English first, then translate them into Chinese. Trust me, that will work.
I also recommend choosing a type of food that represents China. Most Chinese examiners care about consuming FOODs that are delicious yet healthy, ofcourse,and are also currently popular in China. You could do 阿胶, its extremely popular now. So when you get a mid-aged examiner, tell him/her firstly that 阿胶 makes people look younger. Emphasise to a young female examiner that it could improve their skin conditions. Also, 中国的糕 is good,and there are heaps more you could think about.
Ill suggest you more topics if you tell me more specifically about what you are interested in, 
Hm, a place eh? Yeah i wouldnt mind doing a place or food, it is pretty interesting.
Also my friend did 大猫熊, he said it was easy.